WO1995028202A1 - Robinet lineaire a tiroir d'acces a un catheter de veine centrale - Google Patents

Robinet lineaire a tiroir d'acces a un catheter de veine centrale Download PDF

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Publication number
WO1995028202A1
WO1995028202A1 PCT/US1995/004736 US9504736W WO9528202A1 WO 1995028202 A1 WO1995028202 A1 WO 1995028202A1 US 9504736 W US9504736 W US 9504736W WO 9528202 A1 WO9528202 A1 WO 9528202A1
Authority
WO
WIPO (PCT)
Prior art keywords
slide valve
sliding member
elongated
outlet port
sliding
Prior art date
Application number
PCT/US1995/004736
Other languages
English (en)
Inventor
Patrick O. Tennican
L. Myles Phipps
Russell A. Michaelsen
Original Assignee
Hyprotek, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hyprotek, Inc. filed Critical Hyprotek, Inc.
Priority to AU23871/95A priority Critical patent/AU2387195A/en
Publication of WO1995028202A1 publication Critical patent/WO1995028202A1/fr

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Classifications

    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178Syringes
    • A61M5/19Syringes having more than one chamber, e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/02Access sites
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22Valves or arrangement of valves
    • A61M39/223Multiway valves
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/1407Infusion of two or more substances
    • A61M5/1408Infusion of two or more substances in parallel, e.g. manifolds, sequencing valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/0655Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M2005/1401Functional features
    • A61M2005/1403Flushing or purging
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16804Flow controllers
    • A61M5/16827Flow controllers controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86493Multi-way valve unit
    • Y10T137/86501Sequential distributor or collector type

Definitions

  • This invention relates to methods of and systems for accessing catheters which are invasively inserted relative to a patient's blood stream, and to the maintenance of such catheters.
  • Catheters are commonly used to provide quick and direct access to a patient's blood stream. Commonly used catheters range from intravenous lines, which are used in a variety of routine situations, to central venous catheters (CVC), which are used in critical care situations. Catheter maintenance can be costly and troublesome, especially for all but the simplest short-term catheters such as those which access a patient's arm vein. For example, a CVC is inserted by a surgical procedure in a vein very near the heart. A CVC is often left in place for a relatively long time. The skin entry point is kept covered by a carefully monitored dressing. Because of the direct nature of access to the blood stream, infection control when dealing with CVCs is of utmost importance. In most institutions, only registered nurses and doctors are allowed to perform procedures relating to CVC access.
  • a CVC includes one or more external access lumens, each having a terminus injection/withdrawal port which typically includes a needle-less connector such as a Luer-lok connector.
  • the connector is typically connected to a mating piece having a pierceable rubber membrane. Fluid transfer requires first cleaning the pierceable membrane with alcohol and/or Betadine, and then inserting a hypodermic syringe needle through the membrane to provide direct access to the blood stream. In some cases, syringes are connected directly to the CVCs connector without a needle, thereby eliminating the need for the pierceable membrane.
  • CVC access lumens can become clogged by clotted blood and fibrin.
  • Heparin is a protein material which acts as a blood anticoagulant.
  • the heparin and the blood-containing heparin in the catheter is first withdrawn. Also, depending on the patient's condition and the type of catheter, it is sometimes desirable or necessary to withdraw heparin from the catheter before injecting a medication through the catheter.
  • a simple medication injection procedure requiring heparin withdrawal includes the following steps. First, the pierceable membrane of the injection port must be cleaned with alcohol. The success of this step is highly dependent on the skill of the care-giver and is subject to mistakes caused by carelessness or inattentiveness. A needle of a waste blood withdrawal syringe is then inserted through the membrane. The syringe is operated to withdraw the heparin-containing blood from the CVC. Next, the catheter is flushed with a saline syringe. A medication syringe is then prepared, its needle inserted through the pierceable membrane, and medication injected into the CVC.
  • the waste withdrawal needle is removed and a needle of another syringe is inserted to withdraw non-heparin contaminated blood. Then a normal saline flush is injected, followed by a heparin injection with yet another needle and syringe to establish a heparin lock.
  • CVC procedures are performed only by registered nurses or doctors, with the procedure consuming a large quantity of their valuable time.
  • the patient and other care-givers are often forced to remain idle while waiting for the qualified persons to find time to provide the catheter access service.
  • Fig. 1 is a top perspective view of a preferred embodiment catheter access system in accordance with the invention.
  • Fig. 2 is a sectional side view taken along line 2-2 of Fig. 1.
  • Fig. 3 is an enlarged and exploded sectional side view showing the circled portion of Fig. 2.
  • Fig. 4 is an enlarged forward end view of a sliding member as shown in Figs. 1-3.
  • Figs. 5-9 are diagrammatic sectional views taken along line 5-5 of Fig. 1, showing a slide valve in accordance with the invention at various sequential positions.
  • Fig. 10 is an enlarged rearward end view of an alternative sliding member in accordance with the invention.
  • Fig. 11 is a sectional side view taken along line 11-11 of Fig. 10.
  • Fig. 12 is an enlarged forward end view of another alternative sliding member in accordance with the invention.
  • Fig. 13 is a sectional side view taken along line 13-13 of Fig. 12. Best Modes for Carrying Out the Invention and Disclosure of Invention
  • a catheter access system comprises: a slide valve, the slide valve having elongated slide valve walls, the slide valve walls having a plurality of slide valve inlet ports extending therethrough and having a slide valve outlet port extending therethrough; a plurality of syringes having syringe outlet apertures in fluid communication with the slide valve inlet ports; the slide valve including an elongated sliding member which is received for linear sliding movement along a longitudinal axis within the slide valve walls between the slide valve inlet ports and the slide valve outlet port, the elongated sliding member being movable between a plurality of discrete longitudinal positions to individually select slide valve inlet ports for connection to the slide valve outlet port; the elongated sliding member having a plurality of sliding member passageways corresponding to the slide valve inlet ports, each of the sliding member passageways connecting between its corresponding slide valve inlet port and the slide valve outlet port at a corresponding different discrete longitudinal position of the elongated sliding member; the collective sliding member passageways
  • Figs. 1-4 show a catheter access system in accordance with a preferred embodiment of the invention, indicated generally by reference numeral 10.
  • Catheter access system 10 includes a rectangular sterile supporting sheet or base 12 which extends in a longitudinal direction from a rearward end 13 to a forward end 14.
  • Access system 10 also includes a plurality of syringes or syringe barrels 15a-15d (referred to collectively as syringes 15) and a syringe selection slide valve 16, all of which are mounted integrally to base 12.
  • Slide valve 16 is positioned toward forward end 14 of supporting base 12 forwardly from syringes 15.
  • a slide valve outlet tube or port 18 extends from slide valve 16 toward base forward end 14.
  • Valve outlet tube 18 has a Luer-lok connector 20 at its outer end to facilitate needle-less connection between access system 10 and a catheter access line 21, such as a central venous catheter in a patient.
  • Slide valve 16 has a handle or knob 22 which can be positioned or slid by a care-giver to provide fluid communication between a selected one of syringes 15 and slide valve outlet tube 18.
  • Supporting base 12 is formed by laminated first and second (upper and lower) base sheets 24 and 25.
  • Upper base sheet 24 is integrally molded to form a plurality of generally rectangular syringe channels in a thin sheet of medically-approved plastic such as high-density polypropylene, using common blow-molding or injection processes.
  • the syringe channels project upwardly or outwardly from upper sheet 24, having rectangular transverse cross sections and lengths which are formed along upper sheet 24.
  • the channels are open toward the bottom or under side of upper sheet 24.
  • the channels are formed to adjoin each other in side-by-side and parallel relationship. They extend from rearward ends 32 to forward ends 34. After molding, rearward ends 32 are opened by cutting them away for plunger insertion. Forward ends 34 remain closed, but for fluid passages which are described below.
  • upper base sheet 24 is further molded to form first and second opposed and elongated slide valve walls 36 and 38.
  • Slide valve walls 36 and 38 are upstanding ridges molded in upper sheet 24 to project and extend upwardly therefrom. They are open toward the bottom of upper sheet 24.
  • the channels which form syringes 15 intersect first slide valve wall 36.
  • the opposed slide valve walls define and form first and second inner wall or valley surfaces 40 and 42 which in turn form a longitudinal and upwardly-open synclinal valley 44 therebetween.
  • Base sheet 24 forms a flat valley floor 45 between valley walls 36 and 38. Retaining lips 46 are formed along the tops of the slide valve walls.
  • Lower base sheet 25 is preferably a planar sheet of plastic, such as medically-approved high-density polypropylene.
  • Access system 10 is formed by laminating planar lower sheet 25 beneath upper sheet 24. This closes the syringe channels formed by upper sheet 24 to form syringes 15.
  • An independently operable syringe plunger 48 (Fig. 2) is slidably received within each syringe channel. Each syringe plunger 48 is preferably rectangular to fit snugly and sealingly within its syringe barrel.
  • An elongated handle 50 extends from each plunger 48, through open rearward end 32 of the corresponding syringe.
  • a valve inlet port 52 corresponds to each syringe 15 and extends from the interior of said syringe, through first valley wall 36, and into valley 44.
  • the inlet ports form corresponding inlet port orifices 54 in first valley surface 40.
  • Slide valve outlet port 18 includes an enlarged terminating conduit 57 which extends through second valley wall 38 and into valley 44, forming an outlet port orifice 58 in second wall surface 42.
  • syringes 15 are integrally formed with supporting base 12 in the preferred embodiment
  • an access system in accordance with the invention could also use non-integrally formed syringes such as conventional cylindrical plastic syringes.
  • Such syringes would be connected with their outlet apertures in fluid communication with slide valve inlet ports 52, possibly with mating Luer-loc connectors.
  • Slide valve 16 of access system 10 includes an elongated sliding member 60 which is received for linear sliding movement along a longitudinal axis within valley 44.
  • Sliding member 60 is received within slide valve walls 36 and 38 between slide valve inlet ports 52 and slide valve outlet port 18.
  • Sliding member 60 is movable between a plurality of discrete longitudinal positions to individually select slide valve inlet ports 52 for connection to slide valve outlet port 18. It is retained in valley 44 by retaining lips 46.
  • Handle 22 protrudes upwardly from between retaining lips 46.
  • Sliding member 60 is preferably a wedge-shaped solid body which is complementary in shape to synclinal valley 44 so that it fits tightly therein while still being capable of longitudinal sliding motion. It can be inexpensively mass-produced by injection molding a medically-approved plastic. Member 60 has first and second opposed sliding surfaces 62 and 64 which are in sliding abutment with surfaces 40 and 42, respectively, of valley walls 36 and 38; and with inlet and outlet orifices 54 and 58, respectively.
  • sliding member 60 has a plurality of sliding member passageways 66 formed therethrough from first sliding surface 62 to second sliding surface 64.
  • One passageway 66 corresponds to each of inlet ports 52 and to each of syringes 15.
  • the passageways are labelled with suffices a-d to indicate their correspondence with particular syringes 15a-15d.
  • the passageways are located so that different passageways 66 connect between corresponding slide valve inlet ports 52 and slide valve outlet port 18 at different longitudinal positions of sliding member 60.
  • each passageway 66 has a first open termination 70 (Fig. 3) along first sliding surface 62 for selective communication with a corresponding inlet port 52.
  • Each passageway 66 also has a second open termination 72 along second sliding surface 64 to communicate with outlet tube 58.
  • First open terminations 70 are simply the circular openings of passageways
  • First open terminations 70 are positioned so that a single one of first open terminations 70 is aligned with a corresponding one of inlet port orifices 54 at a corresponding one of the discrete longitudinal positions of sliding member 60. Said single one of first open terminations 70 is sealed by first valley surface 40 at other discrete longitudinal positions of sliding member 60.
  • Such selective alignment is accomplished in the preferred embodiment by spacing inlet port orifices 54 longitudinally from each other along first valley surface 40 at a first regular pitch or spacing.
  • Passageways 66 and first open terminations 70 are spaced longitudinally from each other along first sliding surface 62 of sliding member 60 at a second regular pitch or spacing.
  • the first and second regular pitches are different from each other, so that no more than a single one of first open terminations 70 is aligned with an inlet port orifice 54 at any single discrete longitudinal position of elongated sliding member 60.
  • the first pitch is greater than the second pitch in the preferred embodiment.
  • Second open terminations 72 preferably comprise elongated open channels
  • valley wall 80 formed in and along second sliding surface 64 of sliding member 60.
  • the open channels are positioned against second valley surface 42, so that valley wall
  • Each of the second open terminations is positioned to align with outlet port orifice 58 at at least one of the discrete longitudinal positions of elongated sliding member 60. More specifically, the channel associated with each passageway 66 is positioned so that it aligns with outlet port orifice 58 when the passageway's first open termination 70 is aligned with its corresponding inlet port orifice 54.
  • This particular arrangement of passageways and channels defines an exclusive course for fluid communication between the selected slide valve inlet port and the slide valve outlet port to restrict mixing of fluids from different syringes. When an individual syringe is selected by properly positioning sliding member 60, there is only a single course for fluid from the selected syringe to outlet port 18.
  • Figs. 5-9 illustrate the selective and sequential alignment of inlet port orifices 54 and passageways 66 resulting from positioning sliding member 60.
  • the various orifices, ports, and passageways are indicated by reference numeral suffixes a-d, corresponding to syringes 15a-15d, respectively.
  • sliding member 60 is shown in an initial “0”, “off”, or sealed position, in which none of inlet port orifices 54 are aligned with a sliding member passageway 66.
  • Each of slide valve inlet ports 52 is sealed off at its orifice 54 by the abutting first sliding surface 62 of sliding member 60.
  • Fig. 6 shows a first or "1" position of sliding member 60 in which a first, single inlet port orifice 54a aligns with a first, single corresponding sliding member passageway 66a.
  • a first channel 80a associated with first passageway 66a, is aligned for fluid communication with outlet port orifice 58. Moving sliding member 60 to its first position therefore establishes fluid communication from syringe 15a to outlet port 18.
  • Fig. 7 shows a second or "2" position in which a second, single inlet port orifice 54b aligns with a second, single corresponding sliding member passageway 66b.
  • a second channel 80b associated with second passageway 66b, is aligned for fluid communication with outlet port orifice 58. Moving sliding member 60 to its second position therefore establishes fluid communication from syringe 15b to outlet port 18.
  • Figs. 8 and 9 show third and fourth positions of sliding member 60, in which fluid communication is established between third and fourth syringes 15c and 15d, respectively, and outlet port 18.
  • the construction and fabrication methods described above should be inexpensive to implement.
  • Most of the components are formed by upper sheet 24.
  • the syringes, the slide valve walls, and internal individual fluid passages are formed by the upper sheet.
  • This formation in addition to being inexpensive, provides a planar base which can be conveniently taped to a patient or clipped to a patient's gown during catheter access operations.
  • at least one of the laminated upper and lower sheets which forms supporting base 12 preferably has a longitudinal extent or dimension which is greater than a combined longitudinal extent of the syringes and slide valve.
  • base 12 When the access system is packaged in a sterile condition, base 12 provides a sterile field underlying the access components, facilitating sterile connection procedures. Taping the base to a patient greatly simplifies the task of maintaining the cleanliness and sterility of components during catheter access.
  • catheter access system 10 can be used either to inject medication or other solutions into patients through a CVC or other catheter, or to withdraw a patient's blood through the catheter. In either case, the sequence of steps required to accomplish the desired fluid transfers to or from the patient can be accomplished without the numerous and sequential independent connections previously required. As an example, steps involved in administering a patient medication where heparin removal is first required are described below.
  • Catheter access system 10 is preferably provided in a pre-filled condition by or for the care-giver, ready for immediate connection to a CVC access lumen in a patient, for example.
  • a first syringe 15a would not be pre-filled, but would instead be utilized as a fluid withdrawal syringe.
  • a second syringe 15b would be pre-filled with a desired medication.
  • second syringe 15b could be a non-integral syringe which would be filled and connected to access system 10 during or just before use.
  • a third syringe 15c would be pre-filled with a flushing saline, and a fourth syringe 15d would be pre-filled with heparin prior to any access to the catheter.
  • the internal volume of the various fluid conduits and passageways of the system such as outlet tube 18 and fluid passageways 66, would preferably be initially pre-filled with saline to eliminate air.
  • handle 22 With connector 20 of the system connected with the patient's catheter, handle 22 is slid to a position corresponding to first syringe 15a. The plunger 50 of syringe 15a is then withdrawn to withdraw heparin-containing blood from the patient's catheter. Handle 22 is then slid to select second syringe 15b. Medication from syringe 15b is pushed into the catheter and patient. Handle 22 is slid again to select third syringe 15c. Saline is then pushed in to clear all medication from the catheter into the patient, leaving saline in the catheter. Handle 22 is slid one more time to select fourth syringe 15d, and the plunger of syringe 15d is depressed to establish a heparin lock within the patient's catheter.
  • Valve positions are preferably arranged so that sliding handle 22 in one direction, to sequential positions, will facilitate the desired order of steps.
  • the above system could, of course, be utilized in other manners for administering one or more medications to a patient's catheter or for withdrawing blood for analysis from a catheter, as will be appreciated by medical personnel of skill in the art.
  • the above system could be utilized in emergency situations where a typical sequence of multiple drugs might need to be administered through a patient's catheter apart from any association with a catheter having a heparin lock. In such instances, many or all of the apparatus syringes might be provided with medication, as opposed to saline.
  • multiple access systems might be utilized in combination or series in emergency situations.
  • Figs. 10 and 11 illustrate an additional slider member feature which could advantageously be incorporated in the access system described above.
  • Figs. 10 and 11 show an alternatively constructed sliding member 100 which is largely identical to sliding member 60 described above.
  • Sliding member 100 has internal passageways 106, similar to passageways 66 described above, first and second sliding surfaces 104 and 105, and passageway channels 108 on second sliding surface 105.
  • sliding member 100 has additional vent passageways for venting connected syringes prior to fluid administration. More specifically, sliding member 100 has four vent channels 102 formed vertically along its first sliding surface 104.
  • Vent channels 102 are positioned to simultaneously align with all of inlet port orifices 54 at a single position of sliding member 100, and to extend upward therefrom to a point above first valley wall 36. Inlet port orifices 54 are shown in dashed lines in Fig. 10 to indicate this alignment. Vent channels 102 define a sliding member syringe vent position, preferably between the "0" and "1" positions described above. With sliding member 100 in the vent position, the vents connect from the slide valve inlet ports to ambient atmosphere, thus allowing air to be expelled from any connected syringes prior to actual CVC injections. Such a feature would be especially useful in a CVC access device having non-integral syringes, or syringes which are filled just prior to use.
  • Figs 12 and 13 illustrate yet another alternative construction of a sliding member, designated by reference numeral 120.
  • Sliding member 120 has internal passageways 122, similar to passageways 66 described above, first and second sliding surfaces 124 and 126, and first open terminations 128 on first sliding surface 124.
  • outlet tube 18 is physically connected to and extends from second sliding surface 126 of sliding member 120.
  • Passageways 122 each communicate through sliding member 120 with outlet tube 18, being formed to converge at outlet port 18 from first open terminations 128.
  • a slot (not shown) is provided in second valley wall 38 of slide valve 16. Outlet tube 18 extends through the slot, which allows sliding member 120 and its connected outlet tube 18 to slide longitudinally within valley 44.

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Biomedical Technology (AREA)
  • Anesthesiology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Vascular Medicine (AREA)
  • Pulmonology (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

Le dispositif d'accès (10) pour cathéter de la présente invention est constitué d'une feuille de base monobloc moulée (12) intégrant des première et seconde parois opposées (36, 38) du robinet à tiroir. Les parois (36, 38) du robinet à tiroir forment entre elles un sillon longitudinal (44) ouvert vers le haut. Un organe coulissant (60) oblong est inséré dans le sillon (44) dans lequel il a un mouvement coulissant. Plusieurs orifices d'admission (52) de robinet à tiroir sont ménagés au travers de la première paroi (36) du robinet à tiroir. Un orifice de sortie (18) de robinet à tiroir est ménagé au travers de la seconde paroi (38) du robinet à tiroir. Plusieurs seringues (15) sont montées sur la feuille de base monobloc moulée (12), en communication fluide avec les orifices d'admission (52) du robinet à tiroir. L'organe coulissant (60) oblong est mobile dans une pluralité de positions discrètes réparties longitudinalement, permettant de sélectionner individuellement les orifices d'admission (52) du robinet à tiroir à mettre en correspondance avec l'orifice de sortie (18) du robinet à tiroir. L'organe coulissant (60) présente une pluralité de passages (66) correspondant aux orifices d'admission (52) du robinet à tiroir. Les passages (66) sont disposés de façon à établir une communication entre leurs orifices respectifs d'admission (52) du robinet à tiroir et l'orifice de sortie (18) du robinet à tiroir, à chacune des différentes positions discrètes réparties longitudinalement de l'organe coulissant (60) oblong.
PCT/US1995/004736 1994-04-18 1995-04-17 Robinet lineaire a tiroir d'acces a un catheter de veine centrale WO1995028202A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23871/95A AU2387195A (en) 1994-04-18 1995-04-17 Linear slide valve for cvc access

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/229,004 US5454792A (en) 1993-04-19 1994-04-18 Linear slide valve for CVC access
US08/229,004 1994-04-18

Publications (1)

Publication Number Publication Date
WO1995028202A1 true WO1995028202A1 (fr) 1995-10-26

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US (1) US5454792A (fr)
AU (1) AU2387195A (fr)
WO (1) WO1995028202A1 (fr)

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